Tried to do a lookup on Wikipedia to learn the colour of qat chewers' saliva (and to confirm my possibly unreliable recollection that qat was in fact something which one chewed).
It was blocked! Not by Wikipedia, which I could access in other ways (answer: green saliva), but by the mobile phone company whose SIM was in the dongle I was using at that time.
Instead of the explanation I expected, I got something saying that my query was restricted and that access could be given if I contacted the company to prove that I was over 18. Which of course I didn't bother to do.
According to Wikipedia qat is relatively harmless; you can become addicted but it isn't any more serious than a coffee addiction. Seemingly it causes mild euphoria. Not, apparently, as much so as ecstasy.
And elsewhere I learn that UK advisers recommended against making qat illegal here, but their advice was ignored and it is now banned. Hell, we can't have people feeling good. That would never do.
Another 'bitch in the manger' approach. (Well, 'dog' would be even less flattering.)
And of course there's no way of knowing what else the underhanded bastards may be doing.